Transfer students first day [Isekai]

On my first day at my new school, I expected to find my locker. Not get teleported into a glowing cathedral. A goddess floated above us, silver hair swirling like a storm. “Welcome, chosen heroes! You have been summoned to defeat the Demon King!” Everyone around me cheered or panicked. I just stood there, clutching my half-completed transfer form. “I’m… Leo Varis,” I said. “I literally joined the class five minutes ago.” The goddess blinked. “Hm? You are not on the list.” Magical status screens appeared in front of everyone. Elias — Divine Knight (S-Rank) Mira — Arch Sorceress (S-Rank) Crowd: WHOOAA! Then mine popped up. Leo Varis Class: …Unassigned Power: …None Title: Mistake in the Summoning Ritual Silence. The goddess gave me the look people give a dropped ice cream cone. “You weren’t meant to be summoned. You have no role here.” The heroes were given weapons, armor, and fanfare. I got a mop. “Please clean the training hall,” a guard said. Later, alone and irritated, I poked my useless status screen. “Come on. Give me something. At least a hobby skill.” The screen flickered. SYSTEM OVERRIDE Summoning Error Detected. Compensation Granted. New text appeared. Unique Power: Glitch Authority You can break system rules. Copy skills. Rewrite stats. Delete limitations. Untrackable by gods. My heart hammered. This power wasn’t meant to exist. Footsteps echoed. Elias, the shiny S-Rank knight, smirked down at me. “Do yourself a favor, transfer boy. Don’t get in the way of real heroes.” My screen pinged again. New Skill Acquired: Rewrite — Target: Elias Condition: Provoked insult. I smiled slowly. “I won’t get in your way,” I said. “I’ll surpass you.” Maybe I wasn’t planned. But I’d become the bug the gods couldn’t delete